Techniques for reselecting sidelink resources in full duplex wireless communications
Aspects described herein relate to receiving a sidelink resource reservation for receiving, at a first user equipment (UE), a first sidelink transmission from a second UE, selecting a first set of resources for transmitting a second sidelink transmission to a third UE, and reselecting, based on a self-interference metric corresponding to the first sidelink transmission received from the second UE, from the first set of resources to a second set of resources for transmitting the second sidelink transmission to the third UE.
1 . An apparatus capable of full-duplex communication on a sidelink at a first user equipment (UE), comprising:
a transceiver;
a memory configured to store instructions; and
one or more processors communicatively coupled with the memory and the transceiver, wherein the one or more processors are configured to execute the instructions to cause the apparatus to:
receive a sidelink resource reservation indicating resources for receiving, at the apparatus, a first sidelink transmission from a second UE;
select a first set of resources for transmitting a second sidelink transmission to a third UE; and
reselect, based on a self-interference metric corresponding to the first sidelink transmission received from the second UE, from the first set of resources to a second set of resources for transmitting the second sidelink transmission to the third UE.
2 . The apparatus of claim 1 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to measure the self-interference metric based on one or more of performing or predicting a signal measurement associated with one or more of the first sidelink transmission or the second sidelink transmission, wherein the signal measurement is based on one or more of a dedicated reference signal (RS) or ongoing traffic.
3 . The apparatus of claim 2 , wherein the signal measurement includes one or more of a reference signal received power (RSRP), received signal strength indicator (RSSI), rise over thermal (ROT), block error rate (BLER), signal-to-interference-and-noise ratio (SINR), SINR or BLER degradation due to the self-interference, or RSSI or ROT increase caused by the self-interference.
4 . The apparatus of claim 1 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to reselect to the second set of resources based on detecting expiration of a validity of the self-interference metric.
5 . The apparatus of claim 1 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to compute multiple self-interference metrics corresponding to multiple sets of resources, for transmitting the second sidelink transmission, and the first sidelink transmission received from the second UE, wherein the one or more processors are configured to execute the instructions to cause the apparatus to reselect to the second set of resources based on determining that the self-interference metric associated with the second set of resources achieves a threshold.
6 . The apparatus of claim 1 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to reselect to the second set of resources based on a rule regarding resource units that at least partially overlap the sidelink resource reservation in time or frequency, or at least partially overlap a guard time or frequency for the sidelink resource reservation.
7 . The apparatus of claim 1 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to reselect to the second set of resources based on comparing the self-interference metric to a threshold, wherein the second set of resources at least partially overlap the sidelink resource reservation in time or frequency, or at least partially overlap a guard time or frequency for the sidelink resource reservation.
8 . The apparatus of claim 7 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to reselect to the second set of resources according to a channel occupancy ratio (CR), and at least in part by excluding, from the CR, or partially counting in the CR, at least resources that at least partially overlap the sidelink resource reservation in time or frequency, or at least partially overlap a guard time or frequency for the sidelink resource reservation.
9 . The apparatus of claim 8 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to reselect to the second set of resources at least in part by excluding, from the CR, or partially counting in the CR, at least resources for transmitting the first sidelink transmission to another UE that at least partially overlap resources for a third sidelink transmission by the another UE, or at least partially overlap a guard time or frequency for the resources for the third sidelink transmission.
10 . The apparatus of claim 9 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to receive, from the another UE, an indication of sidelink transmission resources used for the third sidelink transmission.
11 . The apparatus of claim 9 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to receive an indication that the another UE is capable to receive communications overlapping in time or frequency with sidelink transmission resources, wherein the second set of resources include resources that at least partially overlap the resources for the third sidelink transmission by the another UE, or at least partially overlap a guard time or frequency for the resources for the third sidelink transmission, based on the indication.
12 . The apparatus of claim 7 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to reselect to the second set of resources according to a channel busy ratio (CBR), and at least in part by excluding, from the CBR, or partially counting in the CBR, at least resources that at least partially overlap the sidelink resource reservation in time or frequency, or at least partially overlap a guard time or frequency for the sidelink resource reservation.
13 . The apparatus of claim 12 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to reselect to the second set of resources at least in part by excluding, from the CBR, or partially counting in the CBR, at least resources for transmitting the first sidelink transmission to another UE that at least partially overlap resources for a third sidelink transmission by the another UE, or at least partially overlap a guard time or frequency for the resources for the third sidelink transmission.
14 . The apparatus of claim 13 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to receive, from the another UE, an indication of sidelink transmission resources used for the third sidelink transmission.
15 . The apparatus of claim 13 , wherein the one or more processors are configured to execute the instructions to cause the apparatus to receive an indication that the another UE is capable to receive communications overlapping in time or frequency with sidelink transmission resources, wherein the second set of resources include resources that at least partially overlap the resources for the third sidelink transmission by the another UE, or at least partially overlap a guard time or frequency for the resources for the third sidelink transmission, based on the indication.
16 . The apparatus of claim 1 , wherein the self-interference metric is associated with one of multiple transmit beams configured for a transmitter and one of multiple receive beams configured for a receiver, and wherein the one or more processors are configured to execute the instructions to cause the apparatus to reselect to the second set of resources for the one of multiple transmit beams and the one of multiple receive beams.
17 . A method for wireless communication at a first user equipment (UE) capable of full-duplex communication on a sidelink, comprising:
receiving a sidelink resource reservation indicating resources for receiving, at the first UE, a first sidelink transmission from a second UE;
selecting a first set of resources for transmitting a second sidelink transmission to a third UE; and
reselecting, based on a self-interference metric corresponding to the first sidelink transmission received from the second UE, from the first set of resources to a second set of resources for transmitting the second sidelink transmission to the third UE.
18 . The method of claim 17 , further comprising measuring the self-interference metric based on one or more of performing or predicting a signal measurement associated with one or more of the first sidelink transmission or the second sidelink transmission, wherein the signal measurement is based on one or more of a dedicated reference signal (RS) or ongoing traffic.
19 . The method of claim 18 , wherein the signal measurement includes one or more of a reference signal received power (RSRP), received signal strength indicator (RSSI), rise over thermal (RoT), block error rate (BLER), signal-to-interference-and-noise ratio (SINR), SINR or BLER degradation due to the self-interference, or RSSI or ROT increase caused by the self-interference.
20 . The method of claim 17 , wherein reselecting to the second set of resources is based on detecting expiration of a validity of the self-interference metric.
21 . The method of claim 17 , further comprising computing multiple self-interference metrics corresponding to multiple sets of resources, for transmitting the second sidelink transmission, and the first sidelink transmission received from the second UE, wherein reselecting to the second set of resources is based on determining that the self-interference metric associated with the second set of resources achieves a threshold.